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Authors
Joshi, Jayant G.; Joshi, Mandar P.; Raghavan, S.; Pattnaik, Shyam S.
This research paper presents a compact dual-band polyester-based wearable bandpass microstrip filter using stepped impedance resonator. In the proposed wearable filter, pass band of 1.85 GHz to 2.66 GHz is useful for ISM band and 3.74 GHz to 7.42 GHz is appropriate to Wi-Fi, WLAN and Wi-Max frequency band applications respectively. In this filter, insertion loss of 0.147 dB and return loss of 32.6 dB at 2.38 GHz insertion loss of 0.469 dB and return loss of 32.3 dB at 4.54 GHz with fractional bandwidth of 34% and 81% is respectively achieved. The proposed wearable filter is fabricated using polyester cloth substrate and selfadhesive copper tape. The Agilent vector network analyzer is used to test the fabricated polyester filter. Good agreement is obtained between the simulated as well as measured insertion loss and return loss of the proposed wearable filter. Equivalent circuit and SAR analysis of this filter is also presented in this paper. Novelty of this research paper is fabrication of high bandwidth dual band wearable filter that can be integrated with wearable antenna to be a wearable Filtenna. Modified equivalent circuit of SIR is prepared and validated. Simulated and measured results are found to be in good agreement.
Abstract
Subjects
BANDPASS filters; MICROSTRIP filters; INSERTION loss (Telecommunication); RESONATORS; WEARABLE antennas; TRANSMISSION line theory; COPPER
Publication
International Journal of Microwave & Optical Technology, 2024, Vol 19, Issue 3, p316
ISSN
1553-0396
Publication type
Academic Journal
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